Neutron scattering studies of the structure of a polyelectrolyte globule in a water-acetone mixture

被引:62
作者
Aseyev, VO
Klenin, SI
Tenhu, H
Grillo, I
Geissler, E
机构
[1] Univ Grenoble 1, Spectrometrie Phys Lab, CNRS, UMR 5588, F-38402 St Martin Dheres, France
[2] Univ Iowa, Dept Chem & Biochem Engn, Iowa City, IA 52242 USA
[3] Russian Acad Sci, Inst Macromol Cpds, St Petersburg 199004, Russia
[4] Univ Helsinki, Polymer Chem Lab, FIN-00014HY Helsinki, Finland
[5] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France
关键词
D O I
10.1021/ma0016331
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The polycationic polyelectrolyte poly(methacryloylethyltrimethylammonium methyl sulfate) (PMETMMS) of high molecular weight (ca. 26 x 10(6) g mol(-)1) in dilute solutions with acetone-water mixtures displays a coil-globule transition above a certain threshold of acetone. SANS observations of this system indicate that the collapsed state of this molecule consists of a sequence of dense spheres with smooth surfaces connected by regions of loose polymer. The radius of the spheres, 28 nm, is smaller than either the hydrodynamic radius (R-H = 39 nm) or the radius of gyration (R-G = 42 nm). The number of such collapsed regions is small (3-4), the volume fraction of polymer inside them being about 8%.
引用
收藏
页码:3706 / 3709
页数:4
相关论文
共 19 条
[1]   Collapse of poly(methacryloylethyl trimethylammonium methylsulfate) on addition of acetone into an aqueous solution [J].
Aseyev, VO ;
Tenhu, H ;
Klenin, SI .
POLYMER, 1999, 40 (05) :1173-1180
[2]   Contraction of a polyelectrolyte upon dilution, light scattering studies on a polycation in basic and acidic water-acetone mixtures [J].
Aseyev, VO ;
Tenhu, H ;
Klenin, SI .
MACROMOLECULES, 1999, 32 (06) :1838-1846
[3]   Contraction of a polyelectrolyte upon dilution. Light-scattering studies on a polycation in saltless water-acetone mixtures [J].
Aseyev, VO ;
Tenhu, H ;
Klenin, SI .
MACROMOLECULES, 1998, 31 (22) :7717-7722
[4]  
Aseyev VO, 1998, J POLYM SCI POL PHYS, V36, P1107, DOI 10.1002/(SICI)1099-0488(199805)36:7<1107::AID-POLB2>3.0.CO
[5]  
2-R
[6]   Cascade of transitions of polyelectrolytes in poor solvents [J].
Dobrynin, AV ;
Rubinstein, M ;
Obukhov, SP .
MACROMOLECULES, 1996, 29 (08) :2974-2979
[7]  
Flory P J., PRINCIPLES POLYM CHE
[8]   MACROSCOPIC AND MICROSCOPIC THERMODYNAMIC OBSERVATIONS IN SWOLLEN POLY(VINYL ACETATE) NETWORKS [J].
HORKAY, F ;
HECHT, AM ;
MALLAM, S ;
GEISSLER, E ;
RENNIE, AR .
MACROMOLECULES, 1991, 24 (10) :2896-2902
[9]   EXCESS CHARGE IN POLYAMPHOLYTES [J].
KANTOR, Y ;
KARDAR, M .
EUROPHYSICS LETTERS, 1994, 27 (09) :643-648
[10]   The nonlinear change in conformation of polyelectrolyte macromolecules in saltless water-organic solvent [J].
Klenin, SI ;
Baranovskaya, IA ;
Aseyev, VO .
MACROMOLECULAR SYMPOSIA, 1996, 106 :205-217